/*************************************************************************
  > File Name: 08.float_cal.c
  > Author: icebear
  > Mail: 3322366195@qq.com
  > Created Time: Tue 18 Jul 2023 12:55:12 PM UTC
 ************************************************************************/

#include <stdio.h>
int main()
{
    float num1=0,num2=0;
    int flag = 1;
    while(flag)
    {
        printf("input two float number\n");
        flag =  scanf("%f%f",&num1,&num2);
        if(flag!=2)
        {
            break;
        }
        printf("result is %f\n",(num1-num2)/(num1*num2));
    }
}
